Means for intermittently perforating and skipping a predetermined number of sheets



N. KATZ Feb. 4, 1958 MEANS FOR INTERMITTENTLY PERFORATING AND SKIPPING 2Sheets-Sheet 1 Filed May 3, 1954 O I C \L 1 A .i.Ill:IIIIII IIII m H IIA 1 :11- O C 5 8 L 1 II A 0 4. PI/Il! mu.

R m m m N. KATZ Feb. 4, 1958 MEANS FOR INTERMITTENTLY PERFORATING ANDSKIPPING A PREDETERMINED NUMBER OF SHEETS 2 Sheets-Sheet 2 Filed May 3,1954 INVENTOR. NATHAN 047-2.

United States Patent MEANS FOR INTERMITTENTLY PERFORATING AND SKIPPING APREDETERMINED NUMBER OF SHEETS Nathan Katz, New York, N. Y.

Application May 3, 1954, Serial No. 427,057

2 Claims. (Cl. 101-226) This invention relates to mechanism forslitting, scoring or perforating, and more particularly is directed toproviding an attachment for sheet fed printing presses for slitting,scoring or perforating selected ones of the sheets being fed through thepress. This application is a continuation-in-part of my priorapplication Serial No. 164,801, filed May 27, 1950, now abandoned.

In books of receipts, tickets or the like, it is common practice toprovide several numbered receipts or tickets on each sheet and toprovide several, preferably three, superposed sheets which may bevari-colored bearing identical numbers so that carbon paper may beinterposed between the mating sheets for producing copies of the topsheet upon which the clerk inscribes the necessary information. The topreceipt may then be detached and given to the customer, the next receiptattached to an article, for example to a garment if the book is used bya cleaning establishment, and the lowermost receipt retained in the bookas a permanent record of the transaction. To provide for the easydetachment of'the uppermost and second receipts, the boundaries ormargins of such receipts are preferably perforated, while it isdesirable that the lowermost sheet be imperforate for security inretaining the copies of the receipts thereon as a permanent record. Inprinting the sheets described above, a press having a suitable numberingdevice is utilized to print the identical numerals on the desired numberof successive sheets fed through the press. The perforating mechanismsheretofore proposed are inadequate for the purpose of perforatingselected ones of the sheets fed through the press and bearing matingnumbers and leaving other sheets bearing such numbers imperforate.

A primary object of this invention is to provide an attachment forprinting presses of the sheet fed type which automatically andselectively perforates, slits or scores certain of the sheets fedthrough the press, preferably the first two sheets and leaving the thirdsheet without such perforation.

Another object of this invention is to provide an attachment of thecharacter described in which the perforating, slitting or scoringelement thereof is rendered inactive during selected intervals,preferably every third revolution of the press and which intervals arecoordinated directly with the operation of the printing press. A furtherobject of this invention is to provide an attachment of the characterdescribe-d which is simple in construction, relatively inexpensive,positive and foolproof in its operation, and easily adapted forattachment to a variety of printing presses.

These and other objects, features and advantages will appear in thefollowing detailed description and in the accompanying drawingsillustrating a specific embodiment of the invention.

In the drawing, wherein like reference characters indicate similarparts:

Fig. 1 is a plan view of three sheets of paper illus- 2,821,915 t em dFeb. 4, 1958 ICC trating the effect of the attachment in perforatingonly two of three sheets fed through the printing press.

Fig. 2 is a fragmentary perspective corner view of a book formed of thethree sheets with carbon paper in between;

Fig. 3 is a side elevation of an attachment constructed according tothis invention and installed upon a printing press, of which a portionis illustrated;

Fig. -4-is a fragmentary top plan view of the attachment illustrated inFig. 3;

Fig. 5 is a side elevational view of the attachment similar to Fig. 3and showing the perforating or scoring element in operative position asdistinguished from the inoperative position illustrated in Fig. 3;

Fig. 6 is an enlarged perspective view of an element of the illustrativeembodiment of this invention; and

Fig. 7 and Fig. 8 are enlarged detailed side elevations of theperforating or securing element showing such element in inoperative andoperative position, respec tively.

Referring to the drawings in detail, and initially to Figs. '1 and 2thereof, a composite of a receipt book or the like is illustrated. Thesame consists of a top sheet 12, a middle sheet 14 and a bottom sheet16, which may be formed of paper or similar material of varied colors;

The top and middle sheets 12 and 14, respectively, are

divided into a plurality of rectangular areas by the perforated line 18.As noted in Fig. 1, the bottom sheet 16 is not scored. Each of thesheets making up a page is further printed with the identicalidentifying symbol or indicia to provide individual receipts. In the useof a page of receipts of the character described, carbon paper C may beinterposed between the sheets 12 and 14 and between the sheets 14 and 16so that any writing" upon the top sheet 12 will be reproduced on theunderlying sheets. The portion of the top sheet 12 may then be separatedalong the score line 18 and presented to the customer as a receipt, theportion of the middle sheet 14 may be similarly detached and secured toan article for the purpose of identifying it, and the nonperforatedbottom sheet retained as a permanent record of the transaction. A margin13 may be provided on the left hand side for binding purposes. Inprinting the indicia upon the three sheets, sheets are fed through aprinting press of suitable type equipped with number ing devices of wellknown construction which change the numerals printed on the sheets afterthree sheetshave been printed. In order to perforate only two out ofeach group of three sheets bearing the same indicia a perforatingattachment soon to be described is mounted directly upon the printingpress and perforates the sheets as the latter undergo the printingoperation with the perforations in the other direction, if more than oneticket appears on a sheet, being formed either before or after .theprinting opeation by a similar or any other suitable perforating device.

- Figs. 3-8 illustrate a perforating attachment accord formed with stubshafts 26 at its opposite ends which are rotatably journalled in theside frames. The impression cylinder 24 has a resilient surface, forexample, rubber, and is rotated by mechanism (not shown.)

The perforating attachment, generally indicated by the numeral 2%,includes a supporting shaft 30 extending parallel to the axis ofrotation of cylinder 24 and rockably journalled at its opposite ends inthe bushings 32 carried by side frames 22. A plurality of suitableperforating devices 34 are mounted upon the shaft 30 in spaced apartrelation. The perforating devices 34 are of known construction, and eachof such devices includes a housing 36 having a split-clamp portionclamped non-rotatably on the shaft 30 by the pressure screw 38 and aperforating wheel 40 rotatably carried by the free end of the housing.By loosening the pressure screws 38, the respective perforating devicesmay be adjusted manually axially and angularly relative to the shaft 30.

A crank-arm 42, seen in detail in Figure 6, includes a top portion 43having a bore 44 formed intermediately therethrough said receiving anend of the shaft 30. A set screw (as shown) extends into the bore 44 andnon-rotatably clamps the crank-arm relative to the shaft. A spring 45 issecured at one end to the side frame 22 and at the other end to an endof the top portion 43 of the crank-arm. The spring 45 constantly urgesthe shaft 30 to rock in the direction for moving the perforating wheels40 against the surface of the cylinder 24. A right angled member 46extends from the end of the top portion remote from the springconnection, and terminates in a laterally disposed U-shaped portion 47extending from its lower end. The free end of the U-shaped portion 47 isbifurcated, as at 48, and a cam follower roller 49 is journalled in thatbifurcated end.

A pinion gear 50 is non-rotatably fixed upon the stub shaft 26 andmeshes with the relatively large spur gear 52 which is rotatablysupported by the boss 54 mounted upon the side frame 22. A cam member 56is mounted upon the spur gear by the fastening devices 57 and is spacedlaterally from the gear by the spacers 58. The cam follower 49 engagesthe peripheral edge of the cam member 56 and the parts are soproportioned that such engagement rocks the arm 42 and shaft 30 formoving the perforating wheels 40 away from the cylinder surface to aninoperative position illustrated in Figures 3 and 8. When the gear 52 isfurther rotated and moves the cam member 56 beyond the cam follower 49,the arm 42 is free to rock under the influence of the spring 45 to forcethe perforating wheels against a sheet on the cylinder, as shown inFigs. and 7. In Fig. 4 it can be seen that the spur gear 52 is receivedwithin the U-shaped portion 47 of the crank-arm 42 and therefore doesnot interfere with the swinging of the latter when it is released fromthe cam surface.

Since in printing presses of the sheet fed type the impression roller orcylinder makes two revolutions for each sheet that is printed, onerevolution for taking up the sheet and the second revolution forprinting the perforating wheels must be retained in the inoperativeposition for two revolutions after every two sheets have moved throughto provide for the imperforate third sheet. In the specific embodimentillustrated, the gear ratio of gears 50 and 52 is 1:6; that is, gear 50makes six revolutions for each complete revolution of gear 52. Themarginal edge or periphery of the cam member 56 has a length equal toone third the circumference of the generating circle. Therefore, theroller 49 will be engaged by the cam member for one third of arevolution of the gear 52 or for two revolutions of the gear 50 out ofevery six revolutions of the latter. Of course, the gear ratio and thelength of-the cam member may be varied to provide for the moving of theperforating wheels to inoperative position coincident'with the feedingof every second sheet, every fourth sheet or at any other selectedinterval.

Since the surface of the impression roller 24 is resilient, metallicbands 60 are disposed upon the cylinder and slidable axially thereon forregistration with the respective perforating wheels 40 to provide asuitably rigid surface against which the perforating wheels may act andto prevent damage to the cylinder surface by such wheels. As seen inFigure 6, the sheet 62 is disposed about the cylinder 24, and theperforating wheel when operative cuts perforations into the sheet.

While sets of three pages having only three tickets on each page areshown, it is understood that more than three tickets may be provided foron each page. Thus, there may be horizontal rows of 4 or more tickets,or rows may be placed horizontally underneath each other. In such casehorizontal perforations are provided on the first two sheets.

Having thus described a specific illustrative embodiment of theinvention, it is apparent that various changes and modifications obviousto one skilled in the related art may be effected without departing fromthe scope of the invention as defined by the appended claims.

What I claim is:

1. In a printing press which includes a pair of side frames, a rotatableimpression cylinder journalled at its opposite ends in the side frames,and a perforating attachment having a plurality of spaced perforatingelements each of which elements includes a housing non rotatably mountedon a shaft and extending radially from the latter and a perforatingwheel rotatable on the free end of said housing; the combination ofmeans for rockably mounting said shaft at its opposite ends in the sideframes for movement about an axis parallel to that of the cylinder, acrank arm fixed on one end of said shaft, spring means connected to saidcrank arm for yieldably urging said perforating wheels against thesurface of the cylinder for perforating a sheet on the latter, a smallgear adapted for mounting on one end of the impression cylinder, arelatively large gear mounted for rotation about an axis parallel to andspaced from the axis of the cylinder and meshing with said small gear,the gear ration between said large and small gears being amultiple oftwo, a segmental radial cam member fixed on said large gear and having aperiphery formed as the arc of a circle equal in length to the inverseof said multiple times the circumference of the generating circle, and acam follower carried by said crank arm and em gageable with theperiphery of said cam member for rocking. said shaft to move saidperforating wheels inthe direction away from the surface of thecylinder.

2. A perforating attachment as set forth in claim 1; wherein said gearratio is one to six and the length of the periphery of said cam memberis one-third of the circumference of the generating circle so that saidpe'rforating wheels are successively spaced from the surface of thecylinder for two revolutions of the latter. and then urged against thecylinder by said spring, means for the subsequent four revolutions ofthe cylinder.

References Cited in the file of this patent UNITED STATES PATENTS366,104 Holm July 5, 1887 771,504 Spoerl Oct. 4, 1904 1,541,201Wennerblad et a1. June 9, 1925 2,434,624 Peterson Ian. 13, 1948

